Abstract: The invention relates to a method for fraud recognition in mobile communication networks, in particular, for fraud recognition in the case of roaming connections, wherein a roaming connection provided for a user identity module, a SIM, is checked for possible misuse by means of at least one criterion. According to the invention, the “engaged rate” for the relevant user identity model is checked as an essential criterion for a given period.

Abstract: A method for preventing fraud or misuse when a User Equipment uses a service of a public land mobile network. The User Equipment includes a Subscriber Identity Module, The Subscriber Identity Module includes address information used for the service of the public land mobile network. The Subscriber Identity Module includes an application program. The application program includes reference address information. The method includes: determining, by the application program of the Subscriber Identity Module of the User Equipment, that the address information does not correspond to the reference address information; and in response to the determining: blocking, by the application program, the service for the User Equipment and sending an error message to the public land mobile network; or invoking, by the application program, the service for the User Equipment using the reference address information.

Abstract: A method for preventing fraud or misuse based on a risk scoring approach when using a service of a service provider requested by a user equipment includes: in connection with a first occurrence of providing the service, the service provider transmits a request message to a subscriber database, the request message being related to the MSISDN of the user equipment, and the request message requesting additional data related to the user equipment and/or the subscriber identity module; the service provider receives an answer message from the subscriber database, the answer message comprising the additional data; and in connection with a second occurrence of providing the service, an authentication information is transmitted between the service provider and the user equipment without transmitting a request message and a corresponding answer message.

Abstract: A method for testing at least one of an inbound or an outbound roaming functionality of a first public land mobile network and a second public land mobile network includes: assigning a first Mobile Station International Subscriber Directory Number (MSISDN) as a testing number in the first public land mobile network; triggering a simulated initiation of the first MSISDN in the second public land mobile network; assigning a second MSISDN as a testing number in the first public land mobile network; activating Call Forwarding on Not Reachable (CFNRc) functionality on the first MSISDN with forwarding to the second MSISDN; forwarding a Provide Roaming Number (PRN) request for the first MSISDN to a Visitor Location Register (VLR) of the second public land mobile network; and receiving a Mobile Station Roaming Number (MSRN) from the VLR of the second public land mobile network.

Abstract: A method for preventing fraud or misuse when a User Equipment uses a service of a public land mobile network. The User Equipment includes a Subscriber Identity Module. The Subscriber Identity Module includes address information used for the service of the public land mobile network. The Subscriber Identity Module includes an application program. The application program includes reference address information. The method includes: determining, by the application program of the Subscriber Identity Module of the User Equipment, that the address information does not correspond to the reference address information; and in response to the determining: blocking, by the application program, the service for the User Equipment and sending an error message to the public land mobile network; or invoking, by the application program, the service for the User Equipment using the reference address information.

Abstract: A method for testing at least one of an inbound or an outbound roaming functionality of a first public land mobile network and a second public land mobile network includes: assigning a first Mobile Station International Subscriber Directory Number (MSISDN) as a testing number in the first public land mobile network; triggering a simulated initiation of the first MSISDN in the second public land mobile network; assigning a second MSISDN as a testing number in the first public land mobile network; activating Call Forwarding on Not Reachable (CFNRc) functionality on the first MSISDN with forwarding to the second MSISDN; forwarding a Provide Roaming Number (PRN) request for the first MSISDN to a Visitor Location Register (VLR) of the second public land mobile network; and receiving a Mobile Station Roaming Number (MSRN) from the VLR of the second public land mobile network.

Abstract: International-roaming-relevant data are exchanged between two roaming partner networks as part of a new communication relationship. From the start of this communication relationship, a logbook is maintained at least on the data-processing system of the first communication network in which logbook changes are entered that relate to the content of the local database. Based on entries in the logbook, the data-processing system recognizes in completely automatic fashion that a synchronization of data is required and implements this action between the internal network operator database and the data-processing system of the second communication network.

Abstract: Method for comparing network data, particularly roaming data and/or routing data, between at least two databases (3, 4), wherein a first database (3) is connected to a first data processing system (2) and the first data processing system (2) is associated with a first communication network (1). A second database (4) is connected to a second data processing system (5) and the second data processing system (5) is associated with a second communication network (6). The first and the second data processing system (2, 5) are connected by a communication connection (7, 8, 9). In the first database (3), network data located in data records are stored and are provided for comparison to the second database (4).

Abstract: The invention relates to a method for fraud recognition in mobile communication networks, in particular, for fraud recognition in the case of roaming connections, wherein a roaming connection provided for a user identity module, a SIM, is checked for possible misuse by means of at least one criterion. According to the invention, the “engaged rate” for the relevant user identity model is checked an essential criterion for a given period.